I'm not sure what case it is as it is over 4 years old and I cant find any model number on it, some Corsair mid-tower for about 100 bucks if I remember correctly but that really doesnt tell you what case it is, but I measured what I'm using atm and it is 120mm h100i with not much more room, dont think I can fit another 20mm there. I may be able to fit a single 140mm on the top of the case or even a double 140 but I'm not sure as the room I would need for the radiator to the MB may not fit.
Though, I am going to buy a new case soon, but I want to buy a new cooler now as the last thing I need is if this h100i's pump goes and the 5% chance that the 8700k failsafe doesnt work I don't wanna fry my CPU or MB. So, I'm gonna either buy a single 120mm replacement cooler right now, or I'm going to buy a full tower case that could easily fit a double 140mm, along with the double 140mm cooler.
So, if you could list maybe list a few of the best single 120mm liquid coolers, or a couple double 140mm as well if you can.